The invention discloses a multi-input multi-output MIMO topological interference alignment method based on user compression The method includes: (1) setting system parameters; (2) constructing a strong link connection model for interfering broadcast channels; (3) obtaining a super user by using a user compression method; (4) constructing a strong link connection model with equal number of base stations and users; (5) constructing a precoding matrix and a decoding vector; (6) obtaining a received signal matrix of the user; 7) decoding the received signal matrix of the corresponding user of theselected base station; 8) obtaining the interference-free received signal of the corresponding user of the selected base station; (9) judging whether all the base stations are selected; (10) nding interference alignment The invention realizes MIMO topological interference alignment method based on user compression, which can be used for improving transmission rate of MIMO interference broadcastchannel system

MIMO topological interference alignment method based on user compression

The invention belongs to the technical field of wireless communication, and discloses an interference management method based on internal and external cascade precoding and a wireless communication system. Firstly, an interference transmitter adopts an internal pre-coding matrix to pre-code a plurality of data streams transmitted by the interference transmitter, so that the data streams can be spatially separated; then, the interaction between the wireless signals is utilized; the interference transmitter designs an external precoding matrix for the equivalent interference by taking the entirety of the plurality of interference components as the equivalent interference, and can compress the plurality of interferences to a spatial dimension at an interfered receiver while enabling the interferences to be distinguishable at a desired receiver corresponding to the interference transmitter. According to the method, the homologous multi-interference can be aligned to one direction at the interfered receiver, meanwhile, the expected receiver corresponding to the signals causing interference can distinguish the signals in the space domain, and the method can be used for solving the management problem of the homologous multi-interference in wireless communication.

Interference management method based on internal and external cascade precoding and wireless communication system

The invention discloses an interference alignment method based on maximum signal to leakage plus noise ratio (SLNR) under an interference broadcast channel. The method comprises the following steps: grouping users to obtain an outer interference suppression matrix and an outer pre-coding matrix of a cell l; solving an inner pre-coding matrix and an inner interference suppression matrix through themaximum SLNR criterion; solving the optimized pre-coding matrix and interference suppression matrix of the user to the cell l from the base station through the cascading. In the interference alignment method disclosed by the invention, the multi-cell multi-user interference elimination is translated into the single-cell multi-user interference elimination problem, and then the pre-coding matrix and the interference suppression matrix of the single cell are iteratively solved by using the maximum SLNR criterion, thereby eliminating the inter-user interference.

Interference alignment method based on maximum signal to leakage plus noise ratio under interference broadcast channel

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Interference alignment method based on maximum signal to leakage plus noise ratio under interference broadcast channel